Tool holder



P. W. KLUZ.

TOOL HOLDER.

APPLICATION FILED APR. 12, 1920. 1,404,44 Patented Jan. 24,1922.

hire/#0; W/fireisesi I v F ,5 pay/1K /1/2 2%.? 2 g fly I ,4

6 1.: f f'a rrley I UNITED STATES PATENT OFFICE.

PAUL W. KLUZ, OF CHICAGO, ILLINOIS.

TOOL HOLDER.

Application filed April 12,

T 0 all whom it may concern:

Be it known that I, PAUL W. KLUZ, a citizen of the United States, and a resident of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements inTool Holders, of which the following is a specification.

My invention relates toimprovements in tool holders and has for its object the provision of an improved device of this character which is of simple construction and ellicient in operation.

Other objects will appear hereinafter.

The invention consists in the combinations and arrangements of parts hereinafter de scribed and claimed.

The invention will be best understood by reference to the accompanying drawings forming a part of this specification, and in which,

Fig. 1, is a side View of a tool holder embodying the invention,

Fig. 2, a top plan view of the same,

Fig. 3, a section taken on line 33 of Fi 1 1% ig. 4, a detail plan view of a modified form of tool,

Fig. 5, an end view corresponding with Fi 4, and

' ig. 6, a section taken on line 6-6 of Fig. 2.

The preferred form of construction, as illustrated in the drawings, comprises a sup porting bar or shank 6 having a clamping head 7 pivotally secured thereto by means of a pivot post 8. The lower end of the pivot post 8 is threaded in a spring socket in the bar 6, said spring socket having a. slit 9 leading therefrom and a clamping screw 10 being. extended across said slit, as shown, and whereby the pivot post 8 may be readily clamped in adjusted positions in the bar 6. The upper portion of the post 8 is tapered, as indicated, to fit a correspondingly tapered socket or opening in the head 7, and a nut 11 is threaded on the upper portion of said post, serving to bind the head 7 to the bar 6 in various positions of adjustment, as will be readily understood. By this arrangement, it will be observed that the post 8 may be nicely adjusted to cause the head 7 to seat firmly on the bar 6 at the same time that it is also firmly bound on the post 8 by the nut 11.

The forward or outer portion of head 7 is formed into a stationary clamping jaw or Specification of Letters Patent. Patented J 24 1922 1920. Serial No. 373,050.

head 12 co-operating with a, corresponding removable jaw 13, said jaws being oper atively connected by a plurality of screw bolts, as indicated. One of these screw bolts 14 is situated centrally adjacent the outer ends of said clamping jaws, and passes freely throu h a threaded opening 15 in the jaw 12, an is threaded in opening 16 in the jaw 13, whereby said clamping jaws may be readily drawn together. The threaded opening 15 is also capable of receiving a larger screw bolt, which would be too large to pass into the opening 16, and may therefore, be utilized either to rest upon the top of a tool between said jaws, or to abut against the jaw 13, as desired. Another clamping screw bolt 17 is similarly passed through the central rear portion of the jaw 13, passing freely through a threaded opening 18 therein and being threaded in an opening or socket 19 in the head 7. By this arrangement also the screw 17 may be utilized as a clamping screw to draw the jaws together, or a larger screw substituted therefor to fit the threads in the opening 18, and thus utilized to abut against the bottom of the shank of a tool or the head 7, as will be readily understood. Two additional and similarly arranged binding screws 20 are positioned in the clamping jaw 13, at either side of the central plane thereof, and are so mounted and arranged as to serve as abutting screws as shown in Fig. 6, or to permit of the substitution of clamping screws when desired. Screws 14, 17 and 20, are made interchangeable in order to provide for the accommodation of tools having shanks of different sizes and shapes. For instance if it is desired to employ a tool in the device having a long slender shank, instead of a shank like that shown in dotted lines in Fig. 2, then small long screws would be substituted for the abutting screws 20, and abutting screws of larger diameter would be substituted for screws 14 and 17, the abutting screws then securely fastening the tool in the clamp, and the small screws substituted for abutting screws in different positions being utilized to tighten the clamp. By this construction, some of the screws may be utilized to tighten the clamp while others may be used to hold the tool in proper position, regardless of the size and shape of the tool shank. The opposed faces of the clamping jaws 12 and 13 are provided with registering V-shaped grooves 21 at each side thereof, as shown in Fig. 3, to adapt the clamp to the engagement of round or rectangular tools. These clamping jaws are also provided with centrally registering rectangular grooves 22, having central V- shaped grooves 23 at the bottoms thereof for en aging tools of various shapes and sizes. l3y this arrangement, the clamping jaws are adapted to engage tools of various shapes and sizes, as will be readily understood.

In Figs. 1, 2 and 3 I have illustrated a tool mounted in the tool holder and especially adapted for the accurate cutting of threads. This tool consists of a shank 2 f having a notch 2 f therein adapted to fit over the bolt 14;, and a dove-tailed socket at its outer end, adapted to receive the correspondingly shaped base 26 of the tool proper 27. The tool 27 is provided with a beveled edge 28 extending at a slight inclination to the body- 26, and a socket 25 is provided with a slit 29 crossed by clamping screw 30 for binding the tool 27 in place in the socket 25, as will be readily understood. The tool is sharpened merely by cutting a notch 31 in the upper end of the beveled edge 28, so that sharpening of r the tool does not change the angle of the edge 28, and all threads cut by the tool will have exactly the same form of thread.

In Figs. 4 and 5 I have illustrated a difi'erent form of tool. Here the shank 32 is slotted at 32' to pass over bolt 14;, and a fiat tool blade 33 is mounted in a dove-tailed slot therein, as shown. The shank 32 is provided with a slot 34 which is pressed together by the clamping action of the screw bolt 14, thus clampingthe tool blade 33 firmly in place in the tool holder, such a tool being especially adapted for cutting off work in an ordinary lathe.

In order to give resiliency to the head 7, a transverse notch 35 is provided therein, thus giving resiliency thereto, which is highly desirable in some classes of work. However, in other classes of work, it is desirable to eliminate such resiliency, and for this purpose I provide a bolt 36 extending transversely through the notch 35, as shown, said bolt being provided with a conical head at one end and a conical nut at the other, and the corresponding portions of the slot being tapered to correspond, and whereby, by tightening the nut 37 on the bolt 36, yielding of the head 7 through slot 35 is prevented when desired.

While I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having described my invention, what I claim as new and desire to secure by Letters Patent is 1. A tool holder comprising a head provided with means for securing a tool therein and having atransverse oppositely tapered notch behind said tool-securing means; a bolt extending transversely through said notch; a conical head on said bolt and a conical nut engaging said bolt and said notch arranged to wedge said notch apart to prevent yielding of said head at said notch, substantially as described.

2. A tool holder comprising a clamping head member and a co-operating clamping jaw member; a clamping screw passing freely through one of said members and threaded in the other; and a clamping screw threaded in one of said members and adapted to abut against a tool between said members, substantially as described.

3. A tool holder comprising a clamping head member and a co-operating clamping jaw member having registering threaded openings of different diameters; and screws fitting said openings, substantially as described.

l. A tool holder comprising a clamping head and a co-operating clamping jaw; a clamping screw passing freely through said head and threaded in said jaw, the opening in said head being larger than said screw and threaded; a clamping screw passing freely through the clamping jaw and threaded in said head, the opening in said jaw being larger than said screw and threaded; and additional screws in said jaw on oppo site sides of a line connecting said first mentioned screws, said additional clamping screws passing freely through said jaw and threaded in said head, the openings in said jaw being larger than said screws and threaded, substantially as described.

5. A tool holder comprising a supporting bar member and a head member pivotally connected together, one of'said members be ing provided with a spring socket and clamping screw therefor a; pivot post threaded at one end in said spring socket and tapered at its other end to fit a correspond In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses." I

PAUL W. KLUZ.

Witnesses:

Rosn K. TRIB, B. G. RICHARDS. 

